Thursday, January 4, 2024

ANA test in the lab. Diagnosis by.. ELISA

ANA test in the lab. Diagnosis by:

  • a. PCR
  • b. Spectrophotometer
  • c. Flam photometer
  • d. ELISA.
ANA=anti nuclear dieases.

The correct answer is d. ELISA (Enzyme-Linked Immunosorbent Assay).

Here's why:

- PCR (Polymerase Chain Reaction):

While PCR can be used to detect some infectious agents associated with autoimmune diseases, it's not the primary test for diagnosing antinuclear antibody (ANA) positivity.

- Spectrophotometer:

This instrument measures light absorption and is not specific for detecting ANA.
Flam photometer: This instrument analyzes elemental composition, which is not relevant for ANA testing.


This immunoassay is specifically designed to detect and quantify ANA in the blood. It is highly sensitive and specific, making it the preferred diagnostic method for ANA testing.

Therefore, based on its specificity and effectiveness for detecting ANA, ELISA is the most appropriate test for diagnosing antinuclear antibody-related diseases in the lab.

Remember, ANA positivity alone is not diagnostic of any specific disease and requires further evaluation by a healthcare professional for accurate diagnosis and treatment.